Heavy Charcoal

CSS

:root {
  --heavy-charcoal: #565350;
  --heavy-charcoal-rgb: 86 83 80;
  --heavy-charcoal-oklch: oklch(0.444 0.006 67.7);
}

.element {
  color: var(--heavy-charcoal);
  background-color: hsl(30 4% 33%);
  border-color: oklch(0.444 0.006 67.7);
}

Tailwind CSS v4

@theme {
  --color-heavy-charcoal: #565350;
  --color-heavy-charcoal-50: #f6f5f3;
  --color-heavy-charcoal-100: #e9e7e6;
  --color-heavy-charcoal-200: #d6d4d1;
  --color-heavy-charcoal-300: #b9b7b4;
  --color-heavy-charcoal-400: #a19e9b;
  --color-heavy-charcoal-500: #898582;
  --color-heavy-charcoal-600: #74716e;
  --color-heavy-charcoal-700: #5d5a58;
  --color-heavy-charcoal-800: #444240;
  --color-heavy-charcoal-900: #2f2d2c;
  --color-heavy-charcoal-950: #1b1a19;
}

SCSS

$heavy-charcoal: #565350;
$heavy-charcoal-rgb: 86, 83, 80;
$heavy-charcoal-light: mix(#fff, $heavy-charcoal, 20%);
$heavy-charcoal-dark: mix(#000, $heavy-charcoal, 20%);

.element {
  color: $heavy-charcoal;
  box-shadow: 0 0 0 2px rgba($heavy-charcoal, 0.35);
}